There are advertisers and publishers in search network ads. The ads given are displayed on the publishers' websites where the necessary codes are added. When the ads on the publishers' websites are viewed, ads that are compatible with the subject of the site are displayed according to the keywords. The pricing and payment terms in display ad network systems are the same as search engine ads. The advertiser determines the areas where these ads will be displayed. Content networks set rules for publishers such as the site being complete, useful, legal, not containing too many ads, and having its own domain. Content that is intended to encourage and force people to click on ads is not allowed. Ads can be text ads or banners. The publisher can block some ads if they want. They may also have the opportunity to choose the ads they will display. Publishers earn income per click on the ads displayed on their site. The content network ad system is an ad system with very little return.